聚醚砜/聚有机硅倍半氧烷可溶性面纱作为多功能纤维增强复合材料的高级改性剂

PES/POSS Soluble Veils as Advanced Modifiers for Multifunctional Fiber Reinforced Composites.

作者信息

Cicala Gianluca, Blanco Ignazio, Latteri Alberta, Ognibene Giulia, Agatino Bottino Francesco, Fragalà Maria Elena

机构信息

Department of Civil Engineering and Architecture and INSTM UdR, University of Catania, V.le A. Doria 6, 95125 Catania, Italy.

Department of Chemical Science and INSTM UdR, University of Catania, V.le A. Doria 6, 95125 Catania, Italy.

出版信息

Polymers (Basel). 2017 Jul 13;9(7):281. doi: 10.3390/polym9070281.

DOI:10.3390/polym9070281

PMID:30970959

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6432202/

Abstract

Novel polyhedral oligomeric silsesquioxanes (POSS)-filled thermoplastic electrospun veils were used to tailor the properties of the interlaminar region of epoxy-based composites. The veils were designed to be soluble upon curing in the epoxy matrix, so that POSS could be released within the interlaminar region. Three different POSS contents, varying from 1 to 10 wt %, were tested while the percentage of coPolyethersulphone (coPES) dissolved in the epoxy resin was kept to a fixed value of 10 wt %. Good quality veils could be obtained at up to 10 wt % of POSS addition, with the nanofibers' diameters varying from 861 nm for the coPES to 428 nm upon POSS addition. The feasibility of the soluble veils to disperse POSS in the interlaminar region was proved, and the effect of POSS on phase morphology and viscoelastic properties studied. POSS was demonstrated to significantly affect the morphology and viscoelastic properties of epoxy composites, especially for the percentages 1% and 5%, which enabled the composites to avoid POSS segregates occurring. A dynamic mechanical analysis showed a significant improvement to the storage modulus, and a shift of more than 30 °C due to the POSS cages hindering the motion of the molecular chains and network junctions.

摘要

新型多面体低聚倍半硅氧烷（POSS）填充的热塑性静电纺丝面纱被用于调整环氧基复合材料层间区域的性能。这些面纱被设计成在环氧基质中固化时可溶解，以便POSS能在层间区域释放。测试了三种不同的POSS含量，从1 wt%到10 wt%不等，而溶解在环氧树脂中的共聚醚砜（coPES）的百分比保持在10 wt%的固定值。在添加高达10 wt%的POSS时可获得高质量的面纱，纳米纤维的直径从coPES的861纳米到添加POSS后的428纳米不等。证明了可溶性面纱在层间区域分散POSS的可行性，并研究了POSS对相形态和粘弹性性能的影响。结果表明，POSS对环氧复合材料的形态和粘弹性性能有显著影响，特别是对于1%和5%的含量，这使得复合材料能够避免POSS偏析的出现。动态力学分析表明，由于POSS笼阻碍分子链和网络节点的运动，储能模量有显著提高，且位移超过30℃。